Closure for containers



061- WS'O. F. a. WIKSTROM 9 CLOSURE FOR CONTAINERS Original Filed March 31, 1927" 2 Sheets-Sheet 1 42 3a 37 q I 4'7 419 6/ 4i 2 II I box 5 44 4 x5 3 2 7 6 lu l 64 1 00140134 Patented Oct. 14, 1930 UNITED STATES PATENT OFFICE FRANK G. WIKSTROM, OF BROOKLYN, NEW YORK, ASSIGNOR TO HADWIK MFG. CO., INC, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK CLOSURE FOR CONTAINERS N Application filed March 31, 1927, Serial No. 179,733. Renewed June 19, 1929.

This invention relates to bungs or closures for receptacles, and is herein shown embod ed in bungs for use in metallic barrels which are usually provided with different size open ings requiring diflerent size bungs.

The general objects of the invention, are to provide an improved bung or closure in which the component elements are so designed as to enable them to be economically and otherwise satisfactorily made from sheet metal by stamping operations, and also to provide a closure which is strong, durable and reliable in use.

Other objects and advantages of the invention will become apparent from the-followin description of the embodiments of it hereai 'ter described, particularly but not necessarily intended for use in sheet metal cap seats or bung sputs hereinafter described but claimed in a divisional application Serial No. 222,409, filed September 28, 1927.

The invention will be understood from the following description taken in connection with the accompanying drawings in wh1ch- Figure 1 is a plan view of a barrel head of the type having a pair of different size openings requiring different size closures.

Figure 2 is a sectional view taken on the line 2.2 of Figure 1 and showing the closure employed in connection with a larger opening of the barrel head.

Figure 3 is a sectional view taken on the line 3-3 of Figure 1 and showing the closure employed in connection with a smaller opening of the barrel head.

Figure 4 is a central sectional view of a modified form of cap adapted for use in connection with'the cap seat of Figure 3, in substitution for the cap there shown.

Figure 5 is a central sectional view showing a pair of die members. adapted to be used in initially securing the cap seat of Figure 2 to the barrel head, and showing also the cap seat and barrel head in position for the operation of the die members.

Figure 6 is a view similar to Figure 5 and showing a pair of die members adapted to be' used in carrying out the final operation in securing the cap seat to the barrel head,

and 'also'showing the cap seat and barrel die members.

Referring to the drawings, the numeral 10 indicates a steel barrel having a head 11 provided with a relatively large opening 12 and a somewhat smaller opening 13. It is with the openings 12 and 13 that the closures embodying this invention are adapted for use.

Referring to Figure 2, the closure shown therein and particularly adapted for use in connection with the larger opening 12 of the barrel head 11, includes a cap seat 14 which, before being secured to the barrel head 11, is adapted as shown in Figure 5 to receive a depending anchor flange 15 carried by the head 11 and surrounding the opening 12 thereof, the flange 15 being highly instrumental in establishing such a connection of the cap seat 14. with the barrel head 11 as to prevent relative movement therebetween. The cap seat 14 is so designed as to enable it to be stamped and otherwise formed in suitable dies and is also designed so as to enable it to be securely attached to the barrel head before the barrel head is attached to the barrel, by means of dies shown in Figures 5 and 6 and hereinafter described.

As shown in Figures 2, 5 and 6, the cap seat 14 includes an internally screw-threaded tubular member 17 formed integral with a relatively fiat gasket seat 18 carrying a downwardly and outwardly projecting 'skirt 19 which terminates in a horizontally disposed base portion 20, the outer margin of which is turned back upon itself, thus forming an upwardly and flange 21 having a width substantially equal to the width of the base portion and having its end, as shown in Figure 5, spaced a sutlicient distance from the outer inclined face of the skirt 19 to permit the anchor flange 15 to enter the space afl'orded between the skirt 19 and the lock flange 21 preparatory to securing the cap seat 14 to the barrel head 11.

In attaching the cap seat 14 to the barrel head 11, the cap seat is placed upon a suitable die member 23, having an upwardly projecting annular supporting rib 24, so shaped as to conform to the space aflorded between the tubular member 17 and the skirt 19 and inwardly projecting look I to support the cap seat in the position shown in Figure 5. With'the cap seat 14 thus supported the barrel head 11, to which the seat is adapted to be connected, and which has 1 Before placing the barrel head 11 in the position shown in Figure 5, the outer surface of the anchor flange 15 may, if desired, be coated with a suitable sealing compound, not shown, in order to further insure an air and liquid-tight seal between the cap seat 14 and the barrel head 11 after these parts have been attached to one another. After positioning the barrel head 11 beneath the die member 25, as shown in Figure 5, the die member is moved downwardly, thereby forcing the lower end of the anchor flange 15 into sliding contact with the outer inclined face of the skirt 19, which in turn deflects the anchor flange 15 outwardlv, as the die member 25 continues to move downwardly, so that the lower end of the anchor flange 15 is ultimately forced into intimate abutting engagement with the cap seat 14 at the fold of the base portion 20 and lock flange 21. In order to insure such intimate contact, the anchor flange 15 is so dimensioned that it projects downwardly, as shown in Figure 5, or a distance somewhat greater than the width of the inner wall of the lock flange 21 plus the thickness of the metal of the lock flange at its free end. Inasmuch as the lower end of the anchor flange 15 moves into engagement with the cap seat 14 at the fold joining the lock flange 21 and the base portion 20 before the die member 25 completes its downward movement, the metal which surrounds the opening 12 in the head 11 and is backed up by a depending abutment 27 carried by the die member 25. is forced outwardly along the outer curved face 'of the abutment 27 and over the adjacent face of the die member 25, as the die member completes its downward movement, thereby causing the head 11 to buckle or become distorted, as shown in Figure 6. such buckling or distortion being permitted by reason of clearance between the adjacent surfaces of the die. members 23 and 25 in their final positions. Immediately after the lower end of the anchor flange 15 engages the cap seat. 14

moved along the lower face of the barrel head and into close en agement with the fold between the anchor ange 15 and the container wall, such fold being backed up by the dependmg abutment 27 of the die member As the die member 25 com letes its downward movement, the lock ange 21, backed up by the abutment 28 of the lower die member, is moved downwardly into a horizontal position and the flange 15 is caused to assume a similar position, where- 5 upon a setting blow is delivered by the die member 25 to the head 11 directly over the flanges 15 and 21, thereby forcing the base portion 20, anchor flange 15 lock flange 21 and container wall into firm face-to-face contact.

After having thus far assembled the cap seat 14 with respect to the barrel head 11, the head with its attached cap seat is placed upon a die member 29 having an upwardly C5 projecting supporting rib 30 and otherwise the same as the die member 23 above explained, except for the omission of the abutment 28 shown in Figure 5. It is upon the die member 29 that the final operation is carried out H in securing the cap seat 14 to the barrel head 11, as shown in Figure 2, and in carrying out this final operation a die member 31 is employed. This die member 31 is provided with an annular depending portion 32, u which, as the die member 31 moves downward engages the buckled or distorted portion or area of the barrel head 11 and moves or forms such head over and down into intimate engagement with the cap seat 14 at the fold between the lock flange 21 and the base portion 20, as shown in Figure 2. It is at this point in the assembling that the buckling or distortion of the barrel head 11, as explained in connection with Figure 5, is utilized to a further advantage, such further advantage residing in the fact that the necessity for any substantial drawing or stretcl1- ing of metal in the head 11 is obviated, since the required amount of metal necessary to 11" the final operation is supplied from the buckled or distorted area with the result that such area again assumes its normally flat condition. The die member 31 is cut away or relieved as shown at 33 in order to acg; commodate the combined thickness of the head 11. base portion 20, lock flange 21 and anchor flange 15, and to at the same time impart asetting blow to the head 11 directly above the horizontally disppsed anchor j) flange 15 and lock flange 21 ator about the time the die member 31 completes its downward movement, thus establishing an air and liquid tight connection between the barrel head 11 and cap seat 14. ."3

In Figure 3 is shown a cap seat 14 which is adapted for use in connection with the smaller opening 13 of the barrel head 11, and which is identical with the cap seat 14, shown in Figure 2, except for dimensions. 123

Because of the identity in structure of the two ca seats, to wit l4 and 14', like parts respectively, of these two cap seats are indicated by corresponding reference numerals. It is to be understood also that the cap seat 14, before being attached to the anchor flange 15' of the barrel head 11, is identical with the cap seat 14, shown in Figure 5, except for dimensions, and that the cap seat 14' is adapted to be connected to the anchor flange 15 in accordance with the method described in connection with Figures 5 and 6. The only difference here is that the cap seat 14 .is lowered with respect to the normal upper surface of the container 11 by providing a depressed portion 57 of the container head in immediate proximity to the connection of the cap seat and container head. The purpose of this lower location of the cap seat is to accommodate the greater height of the cap of smaller size, due to the fact that its squared engaging part is a projection instead of a depression and thus hold this cap when screwed home in a position such that its extreme upper part will be below the chime of the container.

The larger closure which is shown in Figure 2 includes a stamped or drawn sheet metal head plate or cap 37 which is so shaped as to provide a cover 38 having a relatively narrow downwardly projecting peripheral flange or annular shoulder 39 carrying a horizontal flange or seating portion 40 from which downwardly projects an annular flared or obliquely disposed skirt or flange 41. The cover 38 is provided with a squareor rectangular depressed portion 42 which extends from the same side of the head plate 37 as the annular shoulder 39 and is in a spaced relation to the latter, the depressed portion 42 serving as a wrench-receiving socket adapted for the reception of a suitable tool by means of I which the cap 37 may be either screwed into position upon the cap seat 14 or unscrewed therefrom as conditions may require. It wilLbe noted that the horizontal flange or seating portion 40 is positioned in a plane parallel to the planes of the head plate 37 and the base wall of the depressed portion or wrench-receiving socket 42, and that such flange 40 is disposed intermediate such head plate and base wall. With the cover 38 is associated a cup-shaped member or sleeve 44 having an externally screw-threaded wall 45 and a bottom or end wall 46 which extends between the annular shoulder 39 and 'the side walls of the depressed portion or wrench-receiving socket 42 and is connected to the cover 38 by spot welds 47, the bottom 7 46 being provided centrall with a square opening 48 adapted to receive the depresed portion 42 of the cover 38. By rea- 'within the cap 37 is insured preparatory to making the spot welds 47 which serve to firmly unite the cap and cup-shaped member. Turning of the cover 38 with respect to the cup-shaped member 44 is further prevented, as will be readily understood, by reason of the fact that the depressed portion 42 and the opening 48 into which such depressed portion snugly fits are both square.

In attaching the cap 37 to the cap seat 14 the cap 37 is screwed down upon the cap seat 14 to establish intimate engagement between the seating surface 18 of the cap seat 14 and a suitable gasket 49 carried by the cap 37 and encircling the cup-shaped member 44.

Since the cup-shaped member 44 may be screw-threaded throughout the entire length of the wall thereof before the same is attached to thecover 38, it is possible with the structure herein shown to screw the cap 37 down into intimate engagement with the seating surface 18 of the cap seat 14 in the absence of the gasket 49, and since such extreme movement of the cap 37 is permitted, it follows that a relatively thin gasket may be employed in order to provide an effective seal between the cap 37 and the cap seat 14. If desired, the skirt 41 ma be provided with equidistantly spaced per orations 50 any one of which perforations is ada ted to receive a sealing wire 51 which may e anchored to the barrel head 11 by a yoke 52 suitably secured to the barrel head.

In Figure 3, a cap 37' is shown, which is adapted to be used in connection with the smallercap seat 14, and which is of substantially the same construction as the cap 37 except that the cover 38' of the cap 37' is provided-with an upwardly projecting square portion 42' to which a suitable tool, such as a wrench, may be applied to screw the cap 37' down upon the cap seat 14 and thereby establish intimate engagement between the seating surface 18 thereof and the gasket 49'. The cap shown in Figure 3 further differs from the cap shown in Figure 2' in that the screw-threaded cup-shaped member 44 is provided with an upwardly projecting square portion 54 which is adapted to snugly fit into the upwardly projecting square portion 42 so as to facilitate assembling of the cover 38' and the cup-shaped member 44, pursuant to which assembling a plurality of spot welds 47 are made as and for the purpose described in connection with the spot welds 47 of the cap shown in Figure 2.

If desired the cap 37 above described, may be modified as shown in Figure 4, wherein the screw-threaded cup-shaped member 44, instead of being closed at one end, may

be provided with a plurality of tongues 55 which are adapted to project into the upwardly projecting square portion 42' and engage the side walls thereof. These tongues 55, like the upwardly projecting square portion 54 shown in Figure 3, serve to facilitate assembling of the cap preparatory to the making of a plurality of spot welds 47" which serve in conjunction with the tongues 55 to resist turning of the screw-threaded member 44" with respect to the cover 38' when running the cap down into sealing po sition.

The forms of cap or bung shown in Figs. 3 and 4, while broadly claimed in this application, are more specifically covered in a divisional application Serial No. 246,248, filed January 28, 1928, which has resulted in U.'S. Patent No. 1,690,804, dated November 6, 1928.

It will be understood that changes and modifications may be made in the con-.

structions shown and above particularly described without departing from the spirit of the invention or the scope of the following claims.

What is claimed is:

l 1. A bung for a receptacle comprising a drawn sheet metal cover member having a central wrench-receiving portion and a downwardly extending shoulder portion surrounding said wrench-receiving portion, and an externally threaded cup-shaped member fitting snugly within the shoulder portion in said cover member and having a portion adapted to interlock with the wrench-receiving portion of said cover member, wherebysaid cover member and said cup member are interlocked with each other, said parts being welded together.

2. A bung for receptacles comprising a' drawn sheet metal cover member having a central wrench-receiving socket portion and a downwardly extending shoulder portion surrounding said wrench-receiving portion and an externally threaded cup-shaped mem ber fitting snugly within the shoulder portion in saidcover member and having an opening adapted to receive said wrench-redrawn sheet metal head plate having a'central rectangular wrenchmeceiving socket and a narrow annular shoulder projecting from the same side of the head plate as the socket walls and in spaced relation to the latter, V

and said plate further having a narrow annular flange projecting outwardly from said shoulder and positioned ina plane parallel with the planes'of the head plateand the base wall of the socket and intermediate thereof, and a marginal annular flange obliquel inclined outwardly from said first name flange, and an externally threaded sleeve having a wall at one end provided with a central opening to receive the walls of said StiCkBiJ and permanently fixed to the head p ate.

In testimony whereof, Ihave afiixed my signature to this specification.

FRANK G. WIKSTROM.

ceiving socket portion whereby said cover member and cup-shaped member are interlocked with each other, said parts being welded together.

3. A bung for receptacles consisting of a drawn sheet metal head plate having a central rectangular wrench-receiving socket and a relatively narrow annular shoulder projectingfrom the same side of the head plate as the socket walls and in spaced relation to the latter, and an externally threaded sleeve having an end wall provided with a central opening therein through which the socket walls pro1ect, and said end wall extending between the socket walls and the annular Bill lit 

